I was wondering if and how a public videostream could affect a potential yichud situation. For example, may a single guy and girl be secluded if they set up a continuously broadcasting camera and send a link to the video feed to a couple of their trustworthy friends?
There are those who say that if the office is monitored by closed circuit television and the monitors are in a different room than the people in Yichud, then there is no Yichud problem. (Minchas Ish 20:8)
As regards closed circuit television cameras being a mitigating factor in a Yichud situation, see Nitei Gavriel 45:8,9.